drawing circle without floating point calculation

Posted by zaharpopov on Stack Overflow See other posts from Stack Overflow or by zaharpopov
Published on 2010-05-31T03:35:49Z Indexed on 2010/05/31 3:42 UTC
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interview-questions

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geometry

This is common interview question (according to some interview sites) but I can find no normal answers in Internet - some are wrong and some point to complex theory I expect not looked for in interview (like Bressenham algorithm).

The question is simple:

The circle equation is: x^2 + y^2 = R^2. Given R, draw 0,0-centered circle as best as possible without using any floating point (no trigo, square roots, and so on, only integers)

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